Cyrillic Mongolian-to-traditional Mongolian conversion method based on the transformer

Cyrillic Mongolian and Traditional Mongolian are primarily utilized in Mongolia and China. The task of converting Cyrillic Mongolian to Traditional Mongolian (C2T) plays a vital role in facilitating language communication between compatriots of both nations and holds significant importance in the scientific, economic, and cultural domains of both countries. Mongolian words consist of stems and suffixes, resulting in an extensive Mongolian vocabulary that includes a multitude of Out-of-vocabulary (OOV) words. The conversion of OOV words cannot be effectively addressed solely through the use of rules and dictionaries. Hence, this paper presents a Transformer based approach for Cyrillic Mongolian to Traditional Mongolian conversion. Experimental results demonstrate a 5.72% reduction in word error rate (WER) compared to the joint sequence approach.